Sash-fastener



G. GIBSON. SASH PASTBNEB..

(No ModeI.) v

Patented Deo. 28, 1897.

Affeg/ a@ i nl UNITED STATES PATENT OFFICE.

GEROLT GIBSON,- on ST. LOUIS, MISSOURI.

SASHFAST EN ER.

SPECIFICATION forming part of Letters Patent No. 596,445, dated December 28, 1897.

Application filed February 23, 1897. Serial No. 624,581. (No model.)

To all whom t may concern/.-

Be it known that I, GEROLT GIBSON, a citizen of the United States, and a resident of 'the city of St. Louis and State of Missouri,

have invented a new and useful Improvement in Sash-Locks, of which the following is a specification.

My invention relates to sash-locks. Its principal object is to provide a device which will automatically lock the sash at any desired height; and it consists in the combinations and arrangements of parts hereinafter described and claimed.

In the accompanying drawings, which form part of this specification, and in which like numerals referto like parts throughout the sectional views, Figure 1 is a view of my sashlock with the front of the casing removed. Fig. 2 is a horizontal section on the line 2 2 of Fig. 1, looking from below. Fig. 4 is a side edge view. Figs. 5 and 6 show modifications 1 of the generic combination illustrated in Fig.

l. Fig. 3 is a'view of the keeper-rack.

From the casing -1 of my device normally proj ectsa reciprocating locking-bolt 2, adapted to be forced inside of said casing against the continuous pressure of its spring or weight. The locking-bolt after being retracted resumes its normal position automatically, projecting out of the casing between the teeth of the rack-bar 4, unless held by a dog or detent 5, as hereinafter, described. In connection with the lock a rack or keeper bar 4 is used, being generally countersunk in the window-frame, so that its teeth rest iush with the surface. However, when the lock is fastened to the frame the rack-bar is countersunk in the sash to move therewith.

In the construction shown in Figs. 1 and 4: the locking device is a bolt 2, adapted to reciprocate longitudinally in a chamber provided therefor in the casing and normally pressed outward by any suitable spring, such as the lat spring 6 shown, one end of which is iixed, and the other bears against a shoulder on said bolt. This bolt 2 has a fingerpiece'7 projecting through the edge of the casing, whereby the bolt may loe retracted by hand. The upper edge of this bolt is a shoulder or lug 8, and a pivoted detent 9 is arranged in the casing so as to have its free end in the path of this shoulder or lug 8 and thereby constitute a dog or detent 5 therefor,

the arrangement being such that the backward movement of the shoulder or lug on the locking-bolt bears the lever or detent out of thepath thereof, while the forward movement of the bolt is prevented by such detaining device. The detainin g device 9 is preferably pressed by a spring 10.

A device for releasing the locking-bolt from the detaining device is arranged to coperate automatically with the keeper. In Fig. l this' releasing device is integral with the detaining device and consists of a lever 9, (being the same which serves as the detaining device,) whose edge is bowed or cam-shaped, as shown at ll. W'hen in the movement of the sash this curved edge bears against the keeper, the lever is swung aside and disengages the locking-bolt.

In the construction shown in Figs. 4 and 5 the cam-shaped portion isa separaterounded pawl 12, pivoted on the detaining device, but limited in its movement by a lug 13 on said detaining device. This rounded or beveled pawl12 projects through the casing,and in the downward movement of the sash it rides freely over the keeper-rack or escutcheon 4:; butin its upward movement the pawl is prevented from turning on its pivot by the lug or backstop 13, and as it bears against the keeperrack the detaining device is borne aside and disengaged from the lug on the locking-bolt. Thereupon the spring 6 shoots the bolt into the keeper; but the bolt is beveled on its upper side, so that it rides freely over the teeth of the keeper upward1y,but is locked against downward movement.

In order to prevent the detaining device from holding the'bolt when it is pushed back by the keeper-teeth, the shoulder or lug on said bolt is so located relatively to the end of the detaining device that the end of the device will not engage said lug until the bolt is retracted more than is necessary merely to clear the teeth of the keeper.

The operation of the construction shown in Fig. l is as follows; The lock is mounted on the window-sash and the keeper in the frame, (in the position shown,) the sash being locked against downward movement. To unlock it, the bolt is retracted by means of its projecting finger-piece until the detent 9 falls behind the shoulder on said bolt and holds it in its retracted position.

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has the free use of both hands to manipulate the sash. As the cam edge of the detent bears against the edge of the keeper the detent is swung aside and disengaged from the 1ocking-bolt,whereu pon the spring of the bolt continuously exerts a pressure on it, and when the bolt again comes opposite the keeper it is forced into the keeper by said spring.

The operation of the constructions of Figs. 4 and 5 is the same as that just described, with the exception that in the downward movement of the sash the cam portion merely turns on its pivot at each successive tooth of the rack without causing the detaining device to turn and release the bolt, because the spring l0 bears against the curved pawl nearlyv in line with its pivot,whereby said spring exerts its full force to prevent rotation of the detaining device and only a portion thereof to prevent rotation of the pawl; but when the sash has been lowered to the desired point a slight upward movement of the sash will push the pawl against a tooth of the rack and cause the detaining device to turn and disengage the bolt, whereby the sash is locked against downward movement.

It is noted that the lock is reversible and may be mounted on either sash or on the frame, the position when used on the sash being reversed according as it is used to prevent upward or downward movement, and being likewise inverted with respect to the same use when mounted on the frame.

Fig. 5 illustrates an additional feature of considerable importance. The detaining device 9 carries a stud l5 or other suitable bearing-surface on its tailpiece in the path of a springpressed push-bolt 14, which reciprocates in the casing. The end of this pushbolt is beveled, so that when it bears against said stud the stud is borne upwardly, causing the detaining device to swing on its pivot and disengage the locking-bolt. This construction constitutes a positive releasing device and avoids the necessity of raising the sash to release the locking-bolt.

What I claim is- 1. A sash-lock consisting of a reciprocating bolt having one end adapted to enter the keeper and having its other end projecting through the casing and provided With means for retracting the same, and a detaining device adapted to engage said reciprocating bolt when retracted, said detaining device having a cam-shaped piece projecting outwardly beyond the edge of the keeper and adapted t0 coperate therewith whereby, when the sash is moved, said cam-shaped piece cooperates with the keeper to release the reciprocating bolt, substantially as and for the purpose set forth.

2. A sash-lock consisting of a locking device, a detaining device for holding the same in its retracted position and a loose pawl pivoted on said detaining device and adapted to ride idly over the teeth of the keeper-rack in one direction and to coperate automatically with the keeper-rack to release said detaining device when moved in the opposite direction, substantially as and for the purpose set forth.

3. A sash-lock consisting of a locking device, a detaining device for holding the same in its retracted position and a pawl upon said detaining device and adapted to ride idly over the teeth of the keeper-rack in one direction and to coperate automatically with the keeper-rack to release said detaining device when moved in the opposite direction, substantially as and for the purpose set forth.

4. A sash-lock consisting of a locking device, a pivoted detaining device for holding the same in its retracted position and a pawl on said detaining device and adapted to ride idly over the teeth of the keeper-rack in one direction and to coperate automatically with the keeper-rack to release said detaining device when moved in Vthe opposite direction, said detaining device also having a bearingsurface near its free end, and a push-bolt reciprocating through the casing and adapted to coperate with said bearing-surface, substantially as and for the purpose set forth.

5. A sash-lock consisting of a reciprocating spring-pressed bolt furnished with a fingerpiece extending through the casing and having a shoulder, a detent whose free end is arranged to engage said shoulder when the bolt is retracted farther than is necessary for it to clear the keeper, and a rounded pawl pivoted on said detent and extending beyond the edge of the keeper, substantially as and for the purpose set forth.

6. A sash-lock consisting of a reciprocating spring-pressed bolt furnished with a fingerpiece extending through the casing and having a shoulder, a detent whose free end is arranged to engage said shoulder when the bolt is retracted farther than is necessary for it to clear the keeper, and a rounded pawl pivoted on said detent and extending beyond the edge of the keeper, said detent also having a bearing-surface near its free end and a push-bolt reciprocating through the casing and adapted to coperate with said bearingsurface, substantially as and for the purpose set forth.

'7. A sash-lock consisting of a reciprocating spring-pressed bolt furnished with a fingerpiece extending through the casing and having a shoulder, a detent whose free end is arranged to engage said shoulder when the bolt is retracted farther than is necessaryforA it to clear the keeper, and a rounded pawl pivoted on said detent and extending beyond the edge of the keeper and a spring having one end bearing against said pawl nearly in line with its pivot and having its other end bearing against a fixed surface, substantially as and for the purpose set forth.

GEROLT GIBSON. In presence of- JAMEs A. GARR, CHAs. E. WIsE.

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